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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

No 12V Aux or BU Lite Power at 7-pin connector

Old July 7th, 2019, 6:36 PM
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Default No 12V Aux or BU Lite Power at 7-pin connector

re: 2013 Suburban LT w/factory trailer pkg - while troubleshooting inoperative trailer back-up lites, I checked the 7-pin connector and found no voltage to the aux power terminal or the back-up lite terminal. I also checked the socket that feeds the connector - same results. Is there a relay / fuse to check upstream of the connector? Thanks, Jon C
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Old July 7th, 2019, 7:01 PM
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Solved 1/2 the problem - fuse #10 (10A) was blown, now to find the Aux 12V......Jon
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Old July 8th, 2019, 10:40 AM
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More Progress to Report re: missing 12V supply to 7-pin. I found the fuse (#68) for Stud 1 Trailer Battery Connector. - but no wire is connected to Stud 1. When I connected the trailer brake controller, I spotted it's loose lead and connected to Stud 2, but I don't see a loose wire for the 12V - where would it be located?
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Old July 9th, 2019, 5:13 AM
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Here's a link for installing a brake controller in a 2011 Tahoe. Your connections may be the similar.
At 3:42 they show the connections to Stud #1 & #2.
https://www.etrailer.com/tv-install-...hoe-90195.aspx
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Old July 9th, 2019, 11:01 AM
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Thank you, thank you!. Can't wait to get home to find that wire on the firewall. E-trailer vidoes are the best. I had watched an e-trailer video for my brake controller install back in '14, but that one didn't address the 12V wire, so I've gone for a number of years without the feature. Thanks again, especially for citing the "3:42".
Jon C
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Old July 10th, 2019, 6:09 AM
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Old July 10th, 2019, 8:59 AM
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Case Closed. With your assistance & video referral, I spotted the wire, made the connection and now have 12V at the 7-pin. Thank You!
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